1.In a marketing survey, a random sample of 720 women shoppers revealed that 640 remained loyal to their favorite supermarket during the past year (i.e., did not switch stores).
c.(e) What is the margin of error based on a 99% confidence interval? (Use 3 decimal places.)
2.In a marketing survey, a random sample of 1020 supermarket shoppers revealed that 272 always stock up on an item when they find that item at a real bargain price.
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